Source code for pyworkflow.utils.path

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# *
# * Authors:     J.M. De la Rosa Trevin ( [1]
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# * [1] SciLifeLab, Stockholm University
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# * This program is distributed in the hope that it will be useful,
# * but WITHOUT ANY WARRANTY; without even the implied warranty of
# * GNU General Public License for more details.
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# * You should have received a copy of the GNU General Public License
# * along with this program.  If not, see <>.
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This module contains the PATH related utilities
inside the utils module

import os
import shutil
import sys
from glob import glob
import datetime

from pyworkflow.exceptions import PyworkflowException
from pyworkflow.config import Config

ROOT = "/"

[docs]def findFileRecursive(filename, path): """ Finds a file/folder in a single path recursively :param filename: Name (myfile.txt) of the file to look for. :param path: folder to start the search from. :return: The absolute path to the 'filename' found or None if not found. """ for root, dirs, files in os.walk(path): if filename in files or filename in dirs: return os.path.join(root, filename) return None
[docs]def findFile(filename, *paths, recursive=False): """ Search if a file/folder is present in any of the paths provided. :param filename: Name (myfile.txt) of the file to look for. :param paths: N number of folders to look at. :param recursive: If True it will iterate into the subfolders. :return: None if nothing is found. """ if filename: for p in paths: fn = os.path.join(p, filename) if os.path.exists(fn): return fn if recursive: f = findFileRecursive(filename, p) if f: return f return None
[docs]def findRootFrom(referenceFile, searchFile): """ This method will find a path (root) from 'referenceFile' from which the 'searchFile' os.path.exists. A practical example of 'referenceFile' is a metadata file and 'searchFile' is an image to be found from the metadata. Return None if the path is not found. """ absPath = os.path.dirname(os.path.abspath(referenceFile)) while absPath is not None and absPath != '/': if os.path.exists(os.path.join(absPath, searchFile)): return absPath absPath = os.path.dirname(absPath) return None
[docs]def getParentFolder(path): """ Returns the absolute parent folder of a file or folder. Work for folders that ens with "/" which dirname can't""" return os.path.dirname(os.path.abspath(path))
[docs]def replaceExt(filename, newExt): """ Replace the current path extension(from last .) with a new one. The new one should not contains the .""" return os.path.splitext(filename)[0] + '.' + newExt
[docs]def replaceBaseExt(filename, newExt): """ Replace the current basename extension(from last .) with a new one. The new one should not contains the . """ return replaceExt(os.path.basename(filename), newExt)
[docs]def removeBaseExt(filename): """Take the basename of the filename and remove extension""" return removeExt(os.path.basename(filename))
[docs]def removeExt(filename): """ Remove extension from basename """ return os.path.splitext(filename)[0]
[docs]def joinExt(*extensions): """ Join several path parts with a .""" return '.'.join(extensions)
[docs]def getExt(filePath): """ Return the extension given a file. """ return os.path.splitext(filePath)[1]
[docs]def cleanPath(*paths): """ Remove a list of paths, either folders or files""" for p in paths: if os.path.exists(p): if os.path.isdir(p): if os.path.islink(p): os.remove(p) else: shutil.rmtree(p) else: os.remove(p)
[docs]def cleanPattern(pattern): """ Remove all files that match the pattern. """ files = glob(pattern) cleanPath(*files)
[docs]def copyPattern(pattern, destFolder): """ Copy all files matching the pattern to the given destination folder.""" for file in glob(pattern): copyFile(file, destFolder)
[docs]def makePath(*paths): """ Create a list of paths if they don't os.path.exists. Recursively create all folder needed in a path. If a path passed is a file, only the directory will be created. """ for p in paths: if not os.path.exists(p) and len(p): os.makedirs(p)
[docs]def makeTmpPath(protocol): """ Create the scratch folder if SCIPION_SCRATCH variable is defined into the Scipion config, i.o.c create tmp folder """ tmpPath = protocol._getTmpPath() if not os.path.exists(tmpPath) and len(tmpPath): scratchPath = Config.SCIPION_SCRATCH if scratchPath is None: # Case when SCIPION_SCRATCH doesn't exist. TMP folder is created os.makedirs(tmpPath) else: try: project = protocol.getProject() folderId = "_".join([project.getShortName(),project.getProtWorkingDir(protocol)]) tmpScratchFolder = os.path.join(scratchPath, folderId) if os.path.exists(tmpScratchFolder): cleanPath(tmpScratchFolder) os.makedirs(tmpScratchFolder) # Create scratch folder createAbsLink(tmpScratchFolder, tmpPath) # Create a sym link except Exception as e: raise PyworkflowException("Couldn't create the temporary folder %s at:\n %s\nPlease, review %s variable." % (folderId, scratchPath, SCIPION_SCRATCH), url=DOCSITEURLS.CONFIG_SECTION % "scratch-folder") from e
[docs]def makeFilePath(*files): """ Make the path to ensure that files can be written. """ makePath(*[os.path.dirname(f) for f in files])
[docs]def missingPaths(*paths): """ Check if the list of paths os.path.exists. Will return the list of missing files, if the list is empty means that all path os.path.exists """ return [p for p in paths if not os.path.exists(p)]
[docs]def getHomePath(user=''): """Return the home path of a give user.""" return os.path.expanduser("~" + user)
[docs]def expandPattern(pattern, vars=True, user=True): """ Expand environment vars and user from a given pattern. """ if vars: pattern = os.path.expandvars(pattern) if user: pattern = os.path.expanduser(pattern) return pattern
[docs]def getFiles(folderPath): """ Gets all files of given folder and it subfolders. folderPath -- Folder path to get files. returns -- Set with all folder files. """ filePaths = set() for path, dirs, files in os.walk(folderPath): for f in files: filePaths.add(os.path.join(path, f)) return filePaths
[docs]def copyTree(source, dest): """ Wrapper around the shutil.copytree, but allowing that the dest folder also os.path.exists. """ if not os.path.exists(dest): shutil.copytree(source, dest, symlinks=True) else: for f in os.listdir(source): fnPath = os.path.join(source, f) if os.path.isfile(fnPath): shutil.copy(fnPath, dest) elif os.path.isdir(fnPath): copyTree(fnPath, os.path.join(dest, f))
[docs]def moveTree(src, dest): copyTree(src, dest) cleanPath(src)
[docs]def copyFile(source, dest): """ Shortcut to shutil.copy. """ shutil.copy(source, dest)
[docs]def moveFile(source, dest): """ Move file from source to dest. """ copyFile(source, dest) cleanPath(source)
[docs]def getLastFile(pattern): """ Return the last file matching the pattern. """ files = glob(pattern) if len(files): files.sort() return files[-1] return None
[docs]def commonPath(*paths): """ Return the common longest prefix path. It uses the python os.path.commonprefix and then the direname over it since the former is implemented in char-by-char base. """ return os.path.dirname(os.path.commonprefix(*paths))
[docs]def renderTextFile(fname, add, offset=0, lineNo=0, numberLines=True, maxSize=400, headSize=40, tailSize=None, notifyLine=None, errors='strict'): """ Call callback function add() on each fragment of text from file fname, delimited by lines and/or color codes. :param add: callback function with signature (txt, tag='normal') :param offset: byte offset - we start reading the file from there :param lineNo: lines will be numbered from this value on :param numberLines: whether to prepend the line numbers """ textfile = open(fname, encoding='utf-8', errors=errors) size = (os.stat(fname).st_size - offset) / 1024 # in kB for line in iterBigFile(textfile, offset, size, maxSize, headSize, tailSize): if line is not None: lineNo += 1 if notifyLine is not None: notifyLine(line) renderLine(line, add, lineNo, numberLines) else: add("""\n ==> Too much data to read (%d kB) -- %d kB omitted ==> Click on """ % (size, size - headSize - (tailSize or headSize))) add(fname, 'link:%s' % fname) add(' to open it with the default viewer\n\n') if numberLines: add(' ==> Line numbers below are not ' 'in sync with the input data\n\n') offset = textfile.tell() # save last position in file textfile.close() return offset, lineNo
[docs]def renderLine(line, add, lineNo=1, numberLines=True): """ Find all the fragments of formatted text in line and call add(fragment, tag) for each of them. """ # Prepend line number if numberLines and lineNo: add('%05d:' % lineNo, 'cyan') add(' ') # iter 1\riter 2\riter 3 --> iter 3 if '\r' in line: line = line[line.rfind('\r')+1:] # overwriting! # Find all console escape codes and use the appropriate tag instead. pos = 0 # current position in the line we are parsing attribute = None while True: # line looks like: # 'blah blah \x1b[{attr1};...;{attrn}mTEXT\x1b[0m blah blah' # where {attrn} is the color code (31 is red, for example). See # start = line.find('\x1b[', pos) if start < 0: # no more escape codes, just add the remaining text add(line[pos:], attribute) break add(line[pos:start], attribute) end = line.find('m', start+2) if end < 0: # an escape code interrupted by newline... weird break code = line[start+2:end] # See what attribute to use from now on, and update pos if code == '0': attribute = None else: attribute = ASCII_COLOR_2_TKINTER.get(code[-2:], None) pos = end + 1 # go to the character next to "m", the closing char
[docs]def iterBigFile(textfile, offset=0, size=None, maxSize=400, headSize=40, tailSize=None): """ Yield lines from file textfile. If the size to read is bigger than maxSize then yield the first lines until headSize bytes, then yield None, then yield the last lines from tailSize bytes to the end. """ if size is None: # Size in kB of the part of the file that we will read, 2) sizeKb = (textfile.tell() - offset) / 1024 else: sizeKb = size headSizeB = headSize * 1024 tailSizeB = (tailSize or headSize) * 1024 # If the size is bigger than the max that we want to read (in kB). if 0 < maxSize < sizeKb: # maxSize <= 0 means we just want to read it all and not enter here. for line in'\n'): yield line + '\n' yield None # Special result to mark omitting lines*1024-tailSizeB) # ready to show the last bytes # Add the remaining lines (from our last offset) for line in textfile: yield line
[docs]def createUniqueFileName(fn): """ This function creates a file name that is similar to the original by adding a unique numeric suffix. check NamedTemporaryFile from tempfile for alternatives """ if not os.path.os.path.exists(fn): return fn path, name = os.path.split(fn) name, ext = os.path.splitext(name) make_fn = lambda i: os.path.join(path, '%s_tmp_%d_%s' % (name, i, ext)) for i in range(2, sys.maxsize): uni_fn = make_fn(i) if not os.path.os.path.exists(uni_fn): return uni_fn return None
[docs]def getFileSize(fn): """ Shortcut to inspect the size of a file or a folder. """ if not os.path.exists(fn): return 0 elif os.path.isdir(fn): total_size = 0 for dirpath, dirnames, filenames in os.walk(fn): for f in filenames: fp = os.path.join(dirpath, f) if not os.path.islink(fp): total_size += os.path.getsize(fp) return total_size else: return os.path.getsize(fn)
[docs]def getFileLastModificationDate(fn): """ Returns the last modification date of a file or None if it doesn't exist. """ if os.path.exists(fn): ts = os.path.getmtime(fn) return datetime.datetime.fromtimestamp(ts) else: print(fn + " does not exist!!. Can't check last modification date.") return None